Apparatus and method for selecting a QoS in a portable communication system

ABSTRACT

An apparatus and method for selecting a QoS in a portable communication system are provided. The method includes, when using a high quality video communication service, sending a request for the high quality video communication service to a destination terminal using a Circuit Service Data (CSD) channel, receiving a reply message to the high quality video communication service request and, when the reply message is an acceptance of an execution of the high quality video communication service, disconnecting the CSD channel and then connecting a Packet Service Data (PSD) channel, and providing the high quality video communication service using the PSD channel.

This application claims the benefit under 35 U.S.C. §119(a) of a KoreanPatent Application filed in the Korean Intellectual Property Office onJul. 18, 2007 and assigned Serial No. 2007-71535, the entire disclosureof which is hereby incorporated by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an apparatus and method for selecting aQuality of Service (QoS) in a portable communication system. Moreparticularly, the present invention relates to an apparatus and methodfor a user of a portable terminal to directly select a Quality ofService (QoS) and use a video telephone service.

2. Description of the Related Art

In recent years, wireless communications technologies have evolved toprovide supplementary functions, such as data communication functions,in addition to conventional voice communication functions. Exemplarydata communication functions include General Packet Radio Service(GPRS), Code Division Multiple Access (CDMA) Evolution-Data Optimized(EV-DO), CDMA Evolution-Data and Voice (EV-DV), Wideband Code DivisionMultiple Access (WCDMA) and High-Speed Downlink Packet Access (HSDPA).As a result of the development of data communication functions, a videotelephone service is better able to be provided.

The video telephone service requires a caller identifying and signalingmeans. An exemplary signaling means is a Session Initiation Protocol(SIP).

SIP is an application-layer signaling protocol that specifies aprocedure for identifying and locating portable terminals on theInternet and for creating or deleting and modifying multimediacommunication sessions between the portable terminals. SIP is based on arequest/response control paradigm for creating, modifying, andterminating multimedia service sessions such as Internet conferencing,voice communication, voice mail, event notification and instantmessaging. SIP can be used for at least one of Transmission ControlProtocol (TCP) and User Datagram Protocol (UDP).

FIG. 1 is a diagram illustrating a conventional portable communicationsystem providing a video communication service.

In FIG. 1, the portable communication system can include an originationportable terminal 100, a video communication server 110, and adestination portable terminal 102. Herein, the portable communicationsystem may further be operable with another H.324M compatible device 114via a gateway 112.

The portable terminals 100 and 102 supporting the video communicationservice communicate with each other in compliance with an H.324Mprotocol using a Circuit Service Data (CSD) channel when performing thevideo communication service.

The H.324M protocol is a protocol utilized for video communication thatis suitable for use with a low bandwidth communications path. That is,the H.324M protocol is used to transmit image data using only abandwidth of 42 Kbps to 48 Kbps from a total bandwidth of 64 Kbps anduses the remaining bandwidth for a data channel for a voice signal.

In the event that the portable terminals 100 and/or 102 are able tocommunicate with another H.324M compatible device 114, the portableterminals 100 and/or 102 will not be able to use the video communicationservice until a communications path is established via the videocommunication server 110 and gateway 112.

Therefore, there is a drawback that upon initiation of a videocommunication service over the CSD channel in the portable communicationsystem, a video communication service cannot be provided with a highquality of service because of limited bandwidth.

Also, there is a drawback in that use of the video communication serviceis limited because the video communication service over the CSD channelcan only be provided between users registered to a specificcommunication service provider.

Thus, there is needed an apparatus and method for providing a highquality video communication service in a portable communication system.

SUMMARY OF THE INVENTION

An aspect of the present invention is to address at least theabove-mentioned problems and/or disadvantages and to provide at leastthe advantages described below. Accordingly, an aspect of the presentinvention is to provide an apparatus and method configured to support avideo communication service enabling QoS selection in a portablecommunication system.

Another aspect of the present invention is to provide an apparatus andmethod for enabling QoS selection in a portable terminal and providing ahigh quality video communication service.

A further aspect of the present invention is to provide an apparatus andmethod for storing information on a QoS selected by a portable terminalin a video communication server.

The above aspects are achieved by providing an apparatus and method forselecting a QoS in a portable communication system.

According to one aspect of the present invention, a method for providinga video communication service having a selectable Quality of Service(QoS) in a portable terminal is provided. The method includes, whenusing a high quality video communication service, sending a request forthe high quality video communication service to a destination terminalusing a Circuit Service Data (CSD) channel, receiving a reply message tothe high quality video communication service request and, when the replymessage is an acceptance of an execution of the high quality videocommunication service, disconnecting the CSD channel and then connectinga Packet Service Data (PSD) channel, and providing the high qualityvideo communication service using the PSD channel.

According to another aspect of the present invention, a portableterminal for providing a video communication service having a selectableQuality of Service (QoS) is provided. The terminal includes a memoryanti a controller. The memory stores user information of a terminalsending a request for a high quality video communication service andinformation on a notification of an execution or non-execution of avideo communication of the terminals. The controller sends a request forthe high quality video communication service to a destination terminalusing a Circuit Service Data (CSD) channel when using a high qualityvideo communication service and then, when receiving a message of anotification of an execution of a high quality video communicationservice as a reply message to the request, disconnects the CSD channeland then connects a Packet Service Data (PSD) channel to allow the useof the high quality video communication service.

According to a further aspect of the present invention, a videocommunication server for providing a video communication service havinga selectable Quality of Service (QoS) is provided. The server includes amemory and a server controller. The memory stores user information of aportable terminal sending a request for a high quality videocommunication service and information on a notification of an executionor non-execution of a video communication of the terminals. The servercontroller stores and updates user information of the portable terminaland information for notifying an execution or non-execution of a highquality video communication of the terminals in the memory whenreceiving information for requesting a high quality video communicationservice from the portable terminal, and transmits user information of adestination terminal to each terminal when the terminals perform a highquality video communication.

Other aspects, advantages, and salient features of the invention willbecome apparent to those skilled in the art from the following detaileddescription, which, taken in conjunction with the annexed drawings,discloses exemplary embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features and advantages of certainexemplary embodiments of the present invention will become more apparentfrom the following detailed description taken in conjunction with theaccompanying drawings, in which:

FIG. 1 is a diagram illustrating a conventional portable communicationsystem providing a video communication service;

FIG. 2 is a block diagram illustrating a construction of a portablecommunication system providing a selective QoS according to an exemplaryembodiment of the present invention;

FIG. 3 is a flow diagram illustrating a process of providing a selectiveQoS in a video communication server according to an exemplary embodimentof the present invention;

FIG. 4 is a diagram illustrating a construction of high qualitycommunication information record according to an exemplary embodiment ofthe present invention;

FIG. 5 is a flow diagram illustrating a process of providing a selectiveQoS in an origination portable terminal according to an exemplaryembodiment of the present invention;

FIG. 6 is a flow diagram illustrating a process of providing a selectiveQoS in a destination portable terminal according to an exemplaryembodiment of the present invention;

FIG. 7 is a ladder diagram illustrating a process of providing a highquality video communication service with the provision of a selectiveQoS in a portable communication system according to an exemplaryembodiment of the present invention; and

FIG. 8 is a ladder diagram illustrating a process of providing a generalquality video communication service with the provision of a selectiveQoS in a portable communication system according to an exemplaryembodiment of the present invention.

Throughout the drawings, it should be noted that like reference numbersare used to depict the same or similar elements, features andstructures.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

The following description with reference to the accompanying drawings isprovided to assist in a comprehensive understanding of exemplaryembodiments of the invention as defined by the claims and theirequivalents. It includes various specific details to assist in thatunderstanding but these are to be regarded as merely exemplary.Accordingly, those of ordinary skill in the art will recognize thatvarious changes and modifications of the embodiments described hereincan be made without departing from the scope and spirit of theinvention. Also, descriptions of well-known functions and constructionsare omitted for clarity and conciseness.

An apparatus and method for providing a selective Quality of Service(QoS) for a video communication service is described below.

FIG. 2 is a block diagram illustrating a construction of a portablecommunication system providing a selective QoS according to an exemplaryembodiment of the present invention.

Referring to FIG. 2, the portable communication system can include aportable terminal 200 and a video communication server 220.

The portable terminal 200 can include a controller 202 (e.g. aprocessor), a memory 204, an input unit 206, a display unit 208 and acommunication unit 210. The controller 202 controls a general operationof the portable terminal 200. For example, the controller 202 performs aprocess for controlling voice and data communications. In addition to ageneral control function, upon execution of a high quality videocommunication function, the controller 202 transmits user information tothe video communication server 220, updates a high quality communicationinformation record, disconnects a CSD channel, and performs dataexchange over the packet service data channel according to exemplaryembodiments of the present invention. The user information includes atleast one of a phone number, an Internet Protocol (IP) address, andinformation on an execution or non-execution of a QoS communication.

Upon non-execution of the high quality video communication function, thecontroller 202 transmits user information to the video communicationserver 220, updates the high quality communication information recordand performs data exchange over the CSD channel.

The memory 204 includes a Read Only Memory (ROM), a Random Access Memory(RAM) and a flash ROM. The ROM stores a microcode of a program forprocessing and controlling the controller 202 and a variety of referencedata.

The RAM, a working memory of the controller 202, stores temporary datagenerated during execution of a variety of programs. The flash ROMstores various updateable data for safekeeping such as a phone book, anoutgoing message and an incoming message.

The input unit 206 includes numeral key buttons ‘0’ to ‘9’, a menubutton, a cancel button (delete), an OK button, a talk button, an endbutton, an Internet button, navigation key (or direction key) buttonsand a plurality of function keys such as a character input key. Theinput unit 206 provides key data (e.g., a high quality videocommunication request) on a key pressed by a user to the controller 202.

The display unit 208 displays status information generated during theexecution of the portable terminal 200, a limited number of charactersand a large amount of moving and still images. The display unit 110 canbe a color or monochrome Liquid Crystal Display (LCD), OrganicLight-Emitting Diode (OLED) or any other type of device capable ofdisplaying characters, images or indictors.

The communication unit 210 receives and transmits a wireless data signalthrough an antenna (not shown). For example, in a transmission mode, thecommunication unit 214 processes data by channel coding and spreading,converting the processed data into a Radio Frequency (RF) signal, andtransmitting the RF signal. In a reception mode, the communication unit210 converts a received RF signal into a baseband signal, processes thebaseband signal by de-spreading and channel decoding, and restores theprocessed signal into data.

The video communication server 220 can include a server controller 222(e.g. a processor), a memory 224, and a communication unit 226.

The server controller 222 controls the general operation of the videocommunication server 200. For example, upon execution of a videocommunication service, the server controller 222 updates the highquality communication information record using user information receivedfrom a user of the portable terminal 200 and then stores the updatedcommunication information record in the memory 224.

The communication unit 226 communicates with the portable terminal 200and receives user information from the portable terminal 200.

The memory 224 of the video communication server 200 stores the highquality communication information record updated by the servercontroller 222.

The apparatus for providing a selective QoS for video communication hasbeen described above. A method for providing a selective QoS for videocommunication using the apparatus according to an exemplary embodimentof the present invention is described below.

FIG. 3 is a flow diagram illustrating a process of providing a selectiveQoS in the video communication server according to an exemplaryembodiment of the present invention. In the description below, FIG. 4 isa diagram illustrating a construction of the high quality communicationinformation record.

Referring to FIG. 3, the video communication server 220 checks whetherit receives a request for updating the high quality communicationinformation record from a portable terminal 200 in step 301.

The high quality communication information record update request refersto an event for modifying the high quality communication informationrecord in response to a request for high quality video communicationwith a destination portable terminal that is sent from an originationportable terminal to the destination portable terminal.

The video communication server 220 receives user information from theorigination portable terminal in step 303 when receiving the highquality communication information record update request. After that, thevideo communication server 220 updates the high quality communicationinformation record stored in the memory 224 of the video communicationserver 220 using the received user information in step 305.

In particular, the video communication server 220 receives theorigination information and updates the high quality communicationinformation record when receiving a request for high qualitycommunication from the origination portable terminal. The videocommunication server 220 receives destination information and updatesthe high quality communication information record if a response to thehigh quality communication request is received from the destinationportable terminal.

In other words, as shown in FIG. 4, the video communication server 220stores the origination information in an origination information field401 of the high quality communication information record when theorigination information is received from the origination portableterminal and stores the destination information in a destinationinformation field 403 when the destination information is received fromthe destination portable terminal.

The video communication server 220 can set communication stateinformation in a communication state field 405 of the high qualitycommunication information record as “End” if information is receivedregarding a rejection of the high quality communication request from thedestination portable terminal. The video communication server 220 canset the communication state information on the communication state field405 as “Req” if information is received regarding the acceptance of thehigh quality communication request.

The video communication server 220 provides the high qualitycommunication information form the high quality communicationinformation record to the destination portable terminal in step 307 ifit does not receive the high quality communication information recordupdate request in step 301. In other words, the video communicationserver 220 provides the high quality communication information from thehigh quality communication information record to the destinationportable terminal in step 307 if a high quality communicationinformation identification request is received from the destinationportable terminal for identifying a communication state of theorigination portable terminal.

After that, the video communication server 220 terminates the process.

FIG. 5 is a flow diagram illustrating a process of providing a selectiveQoS in an origination portable terminal according to an exemplaryembodiment of the present invention.

Referring to FIG. 5, a controller 202 of the origination portableterminal checks whether an event for using a high quality videocommunication service occurs in step 501.

If the event does not occur, the controller 202 performs a correspondingfunction (e.g., maintaining an existing video communication service) instep 513.

If the event occurs, the controller 202 sends a request for videocommunication to a destination portable terminal over a CSD channel instep 503. That is, at the time the event occurs, the controller 202 cancommunicate with the destination portable terminal over the CSD channel,thereby sending the video communication request.

After that, the controller 202 sets the high quality communicationinformation record of the video communication server 220 in step 505.

In particular, the controller 202 transmits origination information tothe video communication server 220 over a Packet Service Data (PSD)channel and sets the origination information field 401 of the highquality communication information record.

After that, the controller 202 checks whether it receives information onan acceptance of the high quality communication request from thedestination portable terminal in step 507.

Upon receiving the information on the acceptance of the high qualitycommunication request from the destination portable terminal, thecontroller 202 disconnects the connected CSD channel of step 503 in step509 and performs a communication connection over the PSD channel in step511, thereby using a high quality video communication service.

If information is received regarding a rejection of the high qualitycommunication request, the controller 202 performs a communicationconnection over the CSD channel in step 515.

After that, the controller 202 terminates the process.

FIG. 6 is a flow diagram illustrating a process of providing a selectiveQoS in a destination portable terminal according to an exemplaryembodiment of the present invention.

Referring to FIG. 6, a controller 202 of the destination portableterminal cheeks whether an event for using a high quality videocommunication service occurs in step 601.

If the event does not occur, the controller 202 performs a correspondingfunction in step 611.

If the event occurs, the controller 202 identifies the high qualitycommunication information of an origination portable terminal preset atthe video communication server 220 in step 603. After that, thecontroller 202 checks whether the origination portable terminal sends arequest for high quality video communication in step 605.

The controller 202 can identity whether the origination portableterminal sends the high quality video communication request, using thecommunication state information 405 of the high quality communicationinformation record previously stored in the video communication server220.

If it is identified that the origination portable terminal sent the highquality video communication request, the controller 202 disconnects aconnected CSD channel in step 607 and performs a communicationconnection over a PSD channel in step 609, thereby using a high qualityvideo communication service.

The controller 202 performs a communication connection over the CSDchannel in step 613 if it is identified that the origination portableterminal does not send the high quality video communication request.

After that, the controller 202 terminates the process.

FIG. 7 is a ladder diagram illustrating a process of providing a highquality video communication service with the provision of a selectiveQoS in a portable communication system according to an exemplaryembodiment of the present invention.

Referring to FIG. 7, the portable communication system can include anorigination portable terminal 701, a video communication server 703, anda destination portable terminal 705.

The origination portable terminal 701 communicates with the destinationportable terminal 705 over a CSD channel, thereby sending a videocommunication request to the destination portable terminal 705 (step710).

After that, the origination portable terminal 701 connects to the videocommunication server 703 and stores origination information of theorigination portable terminal 701, thereby setting the high qualityvideo communication information record.

The destination portable terminal 705 solicits from its user a selectionof the execution of the high quality video communication when receivinga communication for the video communication request from the originationportable terminal 701. Destination portable terminal 705 may solicitfrom its user the selection of the execution of the high quality videocommunication in a number if different ways. For example, destinationportable terminal 705 may provide a tactile, audible, or visualindication that the user is to make a selection. Alternatively, thedestination portable terminal 705 may include and be able make aselection without the user based on a pre-stored selection, whenreceiving a call for the video communication request from theorigination portable terminal 701. The pre-stored selection may varybased on criteria received with the call, information stored in thedestination portable terminal 705, or other criteria, such as time andlocation. The pre-stored selection may be store locally or remote fromthe destination portable terminal 705.

When detecting an acceptance of the high quality video communicationrequest from the destination portable terminal 705(step 712), thedestination portable terminal 705 transmits user information, that is,information on the user of the destination portable terminal 705, to thevideo communication server 703 (step 714).

Upon receiving the user information, the video communication server 703stores the user information in a destination information field of thehigh quality communication information record, thereby updating the highquality communication information record (step 716).

Next, the destination portable terminal 705 forwards a request fordisconnecting the CID channel to the origination portable terminal 701(step 718). Upon receiving the request, the origination portableterminal 701 initiates a service connection with the destinationportable terminal 705 over a PSD channel (step 720).

The origination portable terminal 701 then initiates data exchange withthe destination portable terminal using an SIP (step 722).

FIG. 8 is a ladder diagram illustrating a process of providing a generalquality video communication service with the provision of a selectiveQoS in a portable communication system according to an exemplaryembodiment of the present invention.

Referring to FIG. 8, the portable communication system can include anorigination portable terminal 801, a video communication server 803, anda destination portable terminal 805.

The origination portable terminal 801 calls the destination portableterminal 805 over a CSD channel, thereby sending a video communicationrequest to the destination portable terminal 805 (step 810).

After that, the origination portable terminal 801 communicates with thevideo communication server 803 and stores origination information of theorigination portable terminal 801, thereby setting the high qualityvideo communication information record. The origination informationincludes at least one of a phone number, an IP address, and informationon an execution or non-execution of a QoS communication.

The destination portable terminal 805 solicits from its user a selectionfor the execution of the high quality video communication when receivinga call for the video communication request from the origination portableterminal 801. Destination portable terminal 805 may solicit from itsuser the selection of the execution of the high quality videocommunication in a number if different ways. For example, destinationportable terminal 805 may provide a tactile, audible, or visualindication that the user is to make a selection. Alternatively, thedestination portable terminal 805 may include and be able make aselection without the user based on a pre-stored selection, whenreceiving a call for the video communication request from theorigination portable terminal 801. The pre-stored selection may varybased on criteria received with the call, information stored in thedestination portable terminal 805, or other criteria, such as time andlocation. The pre-stored selection may be store locally or remote fromthe destination portable terminal 805.

When detecting an rejection of the high quality video communicationrequest from the destination portable terminal 805 (step 812), thedestination portable terminal 805 sends a request for connecting a CSDchannel to the origination portable terminal 801 (step 814). After that,the destination portable terminal 805 transmits user information, thatis, information on the user of the destination portable terminal 805 tothe video communication server 803 (step 816).

Upon receiving the user information, the video communication server 803stores the user information in a destination information field of thehigh quality communication information record and sets a communicationstate field of the high quality communication information record as“End”, thereby updating the high quality communication informationrecord (step 818).

Upon receiving the CSD connection request, the origination portableterminal 801 disconnects a PSD channel connected with the destinationportable terminal 805 (step 820) and then performs data exchange overthe CSD channel (step 822).

In other words, the origination portable terminal 701 initiates a dataexchange over the CSD channel using the H.324M protocol.

As described above, a selective QoS in a portable communication systemaccording to exemplary embodiments of the present invention can be asolution to a lack of QoS caused by limited bandwidth in an existingportable communication system and provides a high quality videocommunication service, thereby providing an alternative to poor qualityvideo communication services.

Alternate embodiments of the present invention can also comprisecomputer readable codes on a computer readable medium. The computerreadable medium includes any data storage device that can store datathat can be read by a computer system. Examples of a computer readablemedium include magnetic storage media (such as ROM, floppy disks, andhard disks, among others), optical recording media (such as CD-ROMs orDVDs), and storage mechanisms such as carrier waves (such astransmission through the Internet). The computer readable medium canalso be distributed over network coupled computer systems so that thecomputer readable code is stored and executed in a distributed fashion.Also, functional programs, codes, and code segments for accomplishingthe present invention can be construed by programmers of ordinary skillin the art to which the present invention pertains

While the invention has been shown and described with reference tocertain preferred embodiments thereof, it will be understood by thoseskilled in the art that various changes in form and details may be madetherein without departing from the spirit and scope of the invention asdefined by the appended claims and their equivalents.

What is claimed is:
 1. A method for providing a video communicationservice having a selectable Quality of Service (QoS) in a portableterminal, the method comprising: sending a request for the high qualityvideo communication service to a destination terminal using a CircuitService Data (CSD) channel; receiving a reply message to the highquality video communication service request and, when the reply messageis an acceptance of an execution of the high quality video communicationservice, providing the high quality video communication service usingPacket Service Data (PSD) channel; and when the reply message is arejection of an execution of the high quality video communicationservice, performing a video communication using the CSD channel, whereinsending the high quality video communication service request to thedestination terminal further comprises: transmitting information of aterminal sending a high quality video communication service request, toa video communication server; and transmitting, by the videocommunication server, a high quality video communication service requestmessage to the destination terminal, and wherein the information of theterminal sending the high quality video communication service requestcomprises at least one of a phone number, an Internet Protocol (IP), andinformation on an execution or non-execution of a QoS communication. 2.The method of claim 1, wherein, upon receiving the high quality videocommunication service request message from the video communicationserver, the destination terminal outputs the request message and thenidentifies if the high quality video communication service is executedby a user.
 3. The method of claim 2, wherein, upon receiving the highquality video communication service request message from the videocommunication server, the destination terminal transmits information ofthe destination terminal to the video communication server whenidentifying that a notification of an execution of the high qualityvideo communication service is input from the user.
 4. A portableterminal for providing a video communication service having a selectableQuality of Service (QoS), the terminal comprising: a memory for storinguser information of a terminal sending a request for a high qualityvideo communication service and information on a notification of anexecution or non-execution of a video communication of the terminals;and a controller for sending a request for the high quality videocommunication service to a destination terminal using a Circuit ServiceData (CSD) channel and then, when receiving a message of a notificationof an execution of a high quality video communication service as a replymessage to the request, providing the high quality video communicationservice using a Packet Service Data (PSD), and for, when receiving anotification of a rejection of a high quality video communicationservice as a reply message to the request, performing a videocommunication using the CSD channel, wherein the controller transmitsinformation of the terminal sending the request for the high qualityvideo communication service, to a video communication server, andrequests the destination terminal to provide the high quality videocommunication service, and wherein the information of the terminalsending the high quality video communication service request comprisesat least one of a phone number, an Internet Protocol (IP), andinformation on an execution or non-execution of a QoS communication. 5.The terminal of claim 4, wherein, upon receiving the high quality videocommunication service request message from the video communicationserver, the destination terminal outputs the request message and thenidentifies if the high quality video communication service is executedby a user.
 6. The terminal of claim 5, wherein, upon receiving the highquality video communication service request message from the videocommunication server, the destination terminal transmits information ofthe destination terminal to the video communication server whenidentifying that a notification of an execution of the high qualityvideo communication service is input from the user.
 7. A videocommunication server for providing a video communication service havinga selectable Quality of Service (QoS), the server comprising: a memoryfor storing user information of a portable terminal sending a requestfor a high quality video communication service via a Circuit ServiceData (CSD) channel and information on a notification of an execution ornon-execution of a video communication of the terminals; and a servercontroller for, when receiving information for requesting a high qualityvideo communication service from the portable terminal, storing andupdating user information of the portable terminal and information fornotifying an execution or non-execution of a high quality videocommunication of the terminals in the memory, and transmitting userinformation of a destination terminal to each terminal when theterminals perform a high quality video communication via a PacketService Data (PSD) channel, wherein the information of the portableterminal sending the high quality video communication service requestcomprises at least one of a phone number, an Internet Protocol (IP), andinformation on an execution or non-execution of a QoS communication. 8.A method for providing a video communication service having a selectableQuality of Service (QoS) in a portable communication system, the methodcomprising: disconnecting a connected Circuit Service Data (CSD) channeland establishing a communication connection over a Packet Service Data(PSD) channel, when receiving a high quality communication request froma destination terminal; and receiving user information and informationon an execution or non-execution of video communication of at least oneof the origination and destination terminal from at least one of theorigination and destination terminal and updating a high qualitycommunication information record to reflect the received userinformation and information on execution or non-execution of videocommunication, when receiving a high quality communication informationrequest from the at least one of the origination and destinationterminal; transmitting a high quality video communication servicerequest message to the destination terminal, and wherein the informationof the terminal sending the high quality video communication servicerequest comprises at least one of a phone number, an Internet Protocol(IP), and information on an execution or non-execution of a QoScommunication.
 9. A non-transitory computer-readable recording mediumhaving recorded thereon a program providing a video communicationservice having a selectable Quality of Service (QoS) in a portablecommunication system, comprising: a first segment, for disconnecting aconnected Circuit Service Data (CSD) channel and establishing acommunication connection over a Packet Service Data (PSD) channel, whenreceiving a high quality communication request from a destinationterminal; and a second segment, for receiving user information andinformation on an execution or non-execution of video communication ofat least one of the origination and destination terminal from at leastone of the origination and destination terminal and updating a highquality communication information record to reflect the user informationand the information on execution or non-execution of videocommunication, when receiving a high quality communication informationrequest from the at least one of the origination and destinationterminal; and a third segment for transmitting a high quality videocommunication service request message to the destination terminal,wherein the information of the terminal sending the high quality videocommunication service request comprises at least one of a phone number,an Internet Protocol (IP), and information on an execution ornon-execution of a QoS communication.
 10. A method in a portableterminal, the method comprising: transmitting, via a first channel, arequest for a video communication service using a second channel to adestination terminal; transmitting information of the portable terminalto a communication server via the second channel, the information of theportable terminal being transmitted to the destination terminal beforeestablishing the second channel between the portable terminal and thedestination terminal; receiving a reply message to the request from thedestination terminal; when the reply message indicates an acceptance ofan execution of the video communication service, providing the videocommunication service using the second channel; and when the replymessage indicates a rejection of the execution of the videocommunication service, providing the video communication service usingthe first channel, wherein the information of the portable terminalcomprises at least one of a phone number, an Internet Protocol (IP)address, or information on an execution or non-execution of a Quality ofService (QoS) communication, and wherein the second channel comprises achannel for a high speed video communication service faster than thevideo communication service using the first channel.
 11. A portableterminal comprising: a communication circuitry; and a processorconfigured to: control the communication circuitry to transmit, via afirst channel, a request for a video communication service using asecond channel to a destination terminal; control the communicationcircuitry to transmit information of the portable terminal to acommunication server via the second channel, the information of theportable terminal being transmitted to the destination terminal beforeestablishing the second channel between the portable terminal and thedestination terminal; receive, via the communication circuitry, a replymessage to the request from the destination terminal, when the replymessage indicates an acceptance of an execution of the videocommunication service, control the communication circuitry to providethe video communication service using the second channel, and when thereply message indicates a rejection of the execution of the videocommunication service, control the communication circuitry to providethe video communication service using the first channel, wherein theinformation of the portable terminal comprises at least one of a phonenumber, an Internet Protocol (IP) address, or information on anexecution or non-execution of a Quality of Service (QoS) communication,and wherein the second channel comprises a channel for a high speedvideo communication service faster than the video communication serviceusing the first channel.
 12. A portable terminal comprising: acommunication circuitry; and a processor configured to: when a requestfor a video communication service using a first channel is received viaa second channel from an originating terminal, identify, via thecommunication circuitry, information of the originating terminal from acommunication server, the information of the originating terminal beingreceived by the portable terminal before establishing the second channelbetween the portable terminal and the originating terminal, control thecommunication circuitry to transmit a reply message for the request tothe originating terminal based on the information of the originatingterminal, when the reply message indicates an acceptance of an executionof the video communication service, control the communication circuitryto provide the video communication service using the first channel, andwhen the reply message indicates a rejection of the execution of thevideo communication service, control the communication circuitry toprovide the video communication service using the second channel,wherein the information of the originating terminal comprises at leastone of a phone number, an Internet Protocol (IP) address, or informationon an execution or non-execution of a Quality of Service (QoS)communication, and wherein the second channel comprises a channel for ahigh speed video communication service faster than the videocommunication service using the first channel.